Before I detail my plan, let me lay out my basic background info. I am a 16 y.a. male from the Yukon Territory, Canada. The Yukon is big. There are very few people. Things look good for me.
I have spent a good portion of my schooling involved in experiential science programs that take me on several day/week long camping trips into the wild to learn about Biology and ecosystems. In my spare time I enjoy rock climbing, wilderness adventure and exploring the limitless forests of the North. Worldwide zombie outbreak permitting I would like to become a Botanist and thus I am familiar with all toxic plant species in the Yukon and can identify hundreds of edible species.

Now to the nitty-gritty.

Assuming I have a weeks notice before the infection begins to reach its way far enough North to affect me I would start preparing for the outbreak by confirming via internet/any remaining news sources that the infection is loose and spreading. Once I have confirmed the world is screwed I would begin preparing to get away from Whitehorse, as it is likely to be the first or second location in the Yukon where the infection appears. I would go to the local hunting fishing store and purchase about 200$ worth of dried and compressed meals. Then I would go to the camping store and get myself a good sturdy tent with a rain fly that would last at least a year of steady use through the three not winter seasons (we DO have summer this far north!), and a sturdy water filter pump with replacement cores. My last stop for supplies would be Canadian Tire to buy as many batteries, lighters, matches and methyl hydrate as I could afford with my remaining cash. As I am lacking a firearms certificate I would not buy any weapons/ammo.

(Note: This is assuming all stores and services are still open at this time. If they were not I would be able to gather enough supplies from home and possibly friends that my plan would still go through without a hitch.)

Once I have finished all my shopping and filled the tank of my car with fuel I would alert only a handful of trusted friends and family of my intentions and see if any individuals whom I know can stand the rigors of surviving off the land for years to come were interested in joining me. Once at home my first order of business would be to aquire one of the rifles from my basement and ask my hunting-enthusiast neighbor if he has any additional ammo for it, seeing as we only have a few dozen rounds left over from when my grandfather was still alive. IF I could not procur any ammo I would noth bother bringing the rifle. If I gathered some ammo I would fit the gun with a scope and set it aside for the moment. Then I would prepare a 60-80 litre pack with the following contents:

General Camping Gear:
1 Down-filled sleeping bag rated to -15 degrees celsius.
1 Inflatable sleeping pad
1 tent, rated for three-season usage with rain fly.
1 Trangea cooking stove with pots and lits, fits together to save bag room.
3 litres of methyl hydrate stove fuel
1 walking pole with compass in the handle
2 Blankets
1 GPS
1 Crank Operated Radio
2 or more boxes of matches
10 butane lighters
1 newspaper (for tinder)
12 tealight candles
Flint and steel
3 needles
3 spools of thread
1 sturdy knife with comfortable handle and sheath\
150-300 feet of nylon, braided rope
2 50 foot lengths of thin, brass wire for snares.
2 compact LED flashlights
1 roll of orange orienteering tape
1 flexible wire saw
1 very sturdy medium-length hatchet.
3 sharpening stones
20 square feet of burlap
1 large, plastic tarp
1 foil survival blanket
1 Small hand shovel

Clothing:
4 synthetic fiber short slevved shirts, dark or subdued colours.
2 pairs of polypro undergarments (long sleeved shirt and leggings)
3 Fleece sweaters
1 down filled parka.
1 pair of insulated snowpants.
2 Pairs of nylon or other synthetic fabric pants.
12 or more pairs of cotton boxer shorts.
1 pair of swimming trunks (Doubles as shorts)
10 Pairs of wool or synthetic fibre socks.
2 Pairs of gloves
1 wide brimmed hat
2 wool toques
1 Buff
1 Wool scarf
1 Balaclava
1 towel

Food:
(Hopefully) 20 pounds of dehydrated meals
1 set of stainless steel cutlery
1 set of folding heavy plastic dishes
5 pounds of flour
1/2 kilogram of salt
10 chocolate bars for morale boost in case of emergency
35 ziploc freezer bags (Don't dismiss these, they are EXTREMELY valuable in outdoor scenarios)
iodine drops for purifying water
water filter with spare cores
2 metal 500 mL water bottles
1 2 liter plastic water pouch (Empty at start to save space)
40 Assorted seed packets

Med Kit:
Iodine for disenfecting wounds
5 razor blades in sterile packaging
20 butterfly sutures
25 bandaids of variying size
2 canisters tylenol or other painkiller
1 Bottle benadryl or other anti-allergen
2 Roll bandages
10 gauze pads
1 pair of small scissors
1 small hand mirror

Other:
1 Pair of classroom scissors, pointy tipped
200 sheets looseleaf lined paper
5 pens
10 wood pencils
2 black permanent markers
spare batteries
The SAS Survival Handbook
2 books on local plant and animal species
1 .22 rifle with scope
100+ rounds of ammuntion for said rifle ( If I am able to aquire any, if not then I won't bring the rifle.)

Looking back I realize it may not all fit into one large pack so I would either bring a second pack or a small sled to transport anything I wouldn't need on my person if I had to leave the second pack/sled behind for any reason.

Please note that my plan is narrated as if I were solitary but it would be much the same with several people.

After making up my pack(s) I would drive south along the Alaska Highway to my cabin, approximately 80 km south of Whitehorse. There I would spend one night at the cabin reviewing my supplies and confirming the plan. The next morning I would load my supplies into the family motor boat and travel along the Southern Lakes to Lake Bennett (This trip only takes one day of solid boating). Once at Bennett I would dock the boat and I would set up camp on the beach. The next day I would take two trips into Lindeman Lake (one for each of my gear bundles), which is a 5 hour hike. Depending on the season I would then hike over the Chilkoot Pass and set up a winter camp in between the towns on Haines and Skagway, Alaska. Each of these towns has a population of only about 150 people and they are about 50 miles apart so the chnace of running into any zombies is remote. I would choose this site for a winter camp because it is situated next to the Lynn Canal so the temperature would stay temperate all winter and there would be plenty of food available. I would choose a spot up on a hill next to the water with a good supply of evergreen trees nearby. I would make a base camp using my tent and tarp and set to work building a simple one room log cabin. I would then wait until the town of Haines is nearly abandoned and try to secure a fishing boat or at least some nets and line. If I could not aquire any of those I could still set snares and deadfall traps in the woods and collect shellfish. Next June I would return via the Chilkoot Pass to Lindeman Lake and set up a summer camp. There is a log cabin there that was built to accomadate wilderness hikers who were hiking the Chilkoot Trail. If by some amazing coincidence this cabin was occupied when I arrived or if there were even a zombie lurking about I would head several kilometers north to the northern end of the lake and set up a camp there.When arriving in June I would set up a vegetable garden in the camp. I would fish from shore and set up a trapline in the surrounding area. In the fall I would hunt moose and caribou and harvest vegetables from the garden. in early to mid September I would pack up and head back over the Chilkoot Pass to my winter camp. I would repeat this process every year until one of several things happened.
A) I recieve word from the outside world that the zombie threat is over and humans have won.
B) An unlikely attack on either of my camps forces me to move further up the coast past Haines or farther into the interior.
C)A natural event makes the Pass unpassable or makes one of my camps unliveable.

In the case of (A) I would verify that the threat is ended then pack up the next summer and head to the city of Juneau, Alaska to see for myself. If the threat is over I would join whats left of society and begin to rebuild. If I saw evidence that the threat was still real I would return to my winter camp immediately.
In the case of (B) and (C) I would gather as much as I could in a hurry and move further up the coast past the town of Haines or I would move into the interior of the Yukon and make my way towards the Liard River Drainage in the the southwest of the Territory and set up a new camp there.

Were it winter when the outbreak struck I would drive the Klondike Highway to Skagway and set out from there. If I could not make it to Skagway due to stalled vehicles or if the highway was blocked by sbow I would drive as far as I could and make the rest of the trip by snowmobile.

That is essentially my plan. If you have any questions or want to point out any flaws you see feel free as I'm very open to feedback.